CN105536105A - Infusion set monitoring system and monitoring method - Google Patents
Infusion set monitoring system and monitoring method Download PDFInfo
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- CN105536105A CN105536105A CN201610143077.3A CN201610143077A CN105536105A CN 105536105 A CN105536105 A CN 105536105A CN 201610143077 A CN201610143077 A CN 201610143077A CN 105536105 A CN105536105 A CN 105536105A
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- chip microcomputer
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
- A61M5/16831—Monitoring, detecting, signalling or eliminating infusion flow anomalies
- A61M5/1684—Monitoring, detecting, signalling or eliminating infusion flow anomalies by detecting the amount of infusate remaining, e.g. signalling end of infusion
- A61M5/16845—Monitoring, detecting, signalling or eliminating infusion flow anomalies by detecting the amount of infusate remaining, e.g. signalling end of infusion by weight
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/18—General characteristics of the apparatus with alarm
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/332—Force measuring means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3331—Pressure; Flow
- A61M2205/3334—Measuring or controlling the flow rate
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- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention relates to an infusion set monitoring system. An infusion bottle is hung on a precise pull force sensor, the real-time weight of the infusion bottle is collected, output and input to an analog-digital conversion module after being amplified, the output end of the analog-digital conversion module is connected with a single-chip microcomputer, after internal calculation of the single-chip microcomputer, infusion remaining weight, flow speed and remaining time data are output in real time, the single-chip microcomputer communicates with an Android smart phone through a Bluetooth module, the Android smart phone displays the infusion remaining weight, the flow speed and the remaining time information in real time, and the single-chip microcomputer outputs a warning signal to an LED lamp to be displayed. A data collection and display instruction is directly sent on the Android phone, so that computer management of hospital infusion information is facilitated. Testing precision is high, power is supplied by a battery, and use is convenient. A photoelectric sensor is not needed, installation is convenient, and cost is low. By the adoption of an anti-interference iteration algorithm, reliable prediction of infusion flow speed and infusion remaining time is achieved. A Zigbee wireless interface is preserved, so that subsequent integration of the infusion set monitoring system and an existing doctor and patient management computer information system of a hospital is facilitated.
Description
Technical field
The present invention relates to a kind of medical auxiliary equipment, particularly a kind of transfusion device monitoring system and monitoring method.
Background technology
Current patient when hospital or household infuse because cannot exact knowledge transfusion remaining time, in infusion process, have the mood that anxiety is waited for more; On the other hand, nurse also mostly by the remaining time that experience estimation is infused, brings inconvenience to work.The residuals weight how Measurement accuracy is infused in infusion process and remaining time, being one is worth research and problem demanding prompt solution.
Summary of the invention
The present invention be directed to the problem that present hospital transfusion workload is heavy, propose a kind of transfusion device monitoring system and monitoring method, residuals weight (the precision 0.1g of transfusion can be measured in real time, about 5) and remaining time (precision 10S), when being less than setting value remaining time when infusing, (as 10 minutes) can cut warning automatically.The acquisition and display of data can realize in Android smartphone, allows patient and nurse grasp the remaining time of transfusion at any time, greatly alleviates the buck fever of patient and the operating pressure of nurse.
Technical scheme of the present invention is: a kind of transfusion device monitoring system, infusion bottle is suspended on accurate pulling force sensor, pulling force sensor gathers the real-time weight of infusion bottle, pulling force sensor exports and be input to analog-to-digital conversion module after amplifying, analog-to-digital conversion module exports and connects single-chip microcomputer, export in real time after single-chip microcomputer internal calculation transfusion residuals weight, flow velocity and remaining time data, single-chip microcomputer is by bluetooth module and Android smartphone communication, Android smartphone shows the residuals weight of liquid in real time, flow velocity and remaining time information, single-chip microcomputer output alarm signal shows to LED.
Described pulling force sensor selected range is the S type full-bridge pulling force sensor of the full liquid weight of transfusion device, and the output sensitivity of sensor is 2.0mv/V.
The monitoring method of described transfusion device monitoring system, concrete steps are as follows:
1) Android smartphone sends data acquisition signal to single-chip microcomputer, and the sampling time interval of single-chip microcomputer setting carries out Real-time Collection to transfusion device weight;
2) single-chip microcomputer carries out data calculating:
Sensor acquisition to gravimetric value be W
0, the gross weight of infusion bottle is W
1, then net weight of infusing:
W
net=W
0-W
1, unit: g;
The sampling time interval of sensor is Ts second, and the sampled value of adjacent 2 times is denoted as W
net_Last, W
net_Curr, utilize differential principle, current infusion flow rate V can be obtained
currfor:
V
curr=(W
net_Last-W
net_Curr)/Ts, unit: g/s;
Estimate T remaining time for the first time
leftfor:
T
left=W
net_Curr/ V
curr,unit: s;
Again transfusion net weight value and infusion flow rate value are carried out iteration, to realize the automatic renewal of data:
V
Last=V
curr,W
net_Last=W
net_Curr；
3) single-chip microcomputer processes calculating data:
Unit of weight is changed into mg by g;
Current flow measured value is greater than the speed of transfusion per second 10, as invalid data, then the front infusion flow rate value once recorded is replaced currency;
Continuous measurement sorts the data for 5 times, gets its intermediate value for exporting;
When being less than setting value remaining time when infusing, single-chip microcomputer output alarm signal;
Using residuals weight, flow velocity and remaining time three kinds of packets header with the addition of ' a ', ' b ', ' c ' three characters respectively as differentiation;
4) single-chip microcomputer transmits data to Android smartphone, can first judge packet first character, then intercept to last data from character after mobile phone receives data, and the different pairs according to character shows according to carrying out classification;
5) Android smartphone sends and stops data acquisition signal to single-chip microcomputer, and single-chip microcomputer stops gathering.
Beneficial effect of the present invention is: transfusion device monitoring system of the present invention and monitoring method, and data acquisition and display instruction directly sends by Android mobile phone, is conducive to the computer management of hospital transfusion information; Adopt data acquisition (ADC) module of high precision pull sensor and 24, measuring accuracy is high; Battery powered, easy to use; Do not need photoelectric sensor, cost easy for installation is lower; Anti-interference iterative algorithm is adopted to realize infusion flow rate and transfusion reliably the estimating of remaining time; Reserved Zigbee wave point, is convenient to follow-uply carry out integrated with hospital existing doctors and patients supervisory computer information system.
Accompanying drawing explanation
Fig. 1 is transfusion device monitoring system structural representation of the present invention;
Fig. 2 is transfusion device monitoring system circuit diagram of the present invention;
Fig. 3 is operating handset flow chart in transfusion device monitoring system of the present invention.
Detailed description of the invention
Transfusion device monitoring system structural representation as shown in Figure 1, infusion bottle is suspended on accurate pulling force sensor, the weight of pulling force sensor perception residue transfusion in infusion process.The mV magnitude voltage signals that pulling force sensor exports is input to 24 ADC modules after amplifying, and realizes STC15W4K single-chip microcomputer Real-time Collection remaining liq weight.STC15W4K single-chip microcomputer is faster than the 51 traditional microcontroller speeds of service, program is not easily maliciously cracked, power consumption is lower.Inner at STC15W4K single-chip microcomputer, adopt anti-interference iterative algorithm to realize reliably estimating of infusion flow rate and transfusion remaining time.STC15W4K single-chip microcomputer is connected with bluetooth module by RXD, TXD serial ports, residuals weight of infusing, flow velocity and remaining time information send to Android smartphone by bluetooth module.Maximum transmission power+the 10dB of bluetooth module, transmitting distance can reach 30 meters, meets the instructions for use in hospital transfusion hall.At Android smartphone end, we have developed corresponding application A PP.Data acquisition can be sent, stop acquisition instructions to test terminal STC15W4K single-chip microcomputer, and the residuals weight of real-time display liquid, flow velocity and remaining time information.Be less than safe threshold (such as 6 minutes) when remaining time, then red LED lamp warning lighted by STC15W4K single-chip microcomputer.
Transfusion device monitoring system effect is: (1) receives the data acquisition instructions of smart mobile phone end.(2) weight of remaining liq in real-time perception transfusion device, provides transfusion remaining time after iterative estimation.And above-mentioned information is sent to smart mobile phone end (3).For this reason, we devise transfusion device monitoring system circuit diagram as shown in Figure 2, and U1 is STC15W4K single-chip microcomputer, and compared with 51 traditional single-chip microcomputers, its speed of service is faster, be convenient to encryption, power consumption is lower; U2 is the ADC module of 24, and the millivolt level small-signal being responsible for pulling force sensor to export is input to STC15W4K microcontroller through DOUT pin after amplifying; The external bluetooth module of J2 interface, is responsible for the data communication with smart mobile phone; J3 interface is used for download program, and is reserved as the interface of follow-up Zigbee wireless networking; Circuit adopt 4 joint No. 5 dry cell power supplies (supply voltage is 6V), through U1 indicate the voltage stabilizing of LM7805 voltage stabilizing chip at 5V, be single-chip microcomputer and ADC module for power supply.C7 is the filter capacitor of 0.1uF; LED1, LED2 and LED3 are respectively power supply indicator, data acquisition display lamp and alarm lamp.
As follows for the anti-interference iteration predictive algorithm of infusing remaining time:
Sensor acquisition to gravimetric value be W
0, the gross weight of infusion bottle is W
1, then net weight of infusing:
W
net=W
0-W
1(unit: g) (1)
The sampling time interval of sensor is Ts second, and the sampled value of adjacent 2 times is denoted as W
net_Last, W
net_Curr, utilize differential principle, current infusion flow rate V can be obtained
currfor:
V
curr=(W
net_Last-W
net_Curr)/Ts(unit: g/s) (2)
Estimate T remaining time for the first time
leftfor:
T
left=W
net_Curr/ V
curr(unit: s) (3)
Again transfusion net weight value and infusion flow rate value are carried out iteration, to realize the automatic renewal of data:
V
Last=V
curr,W
net_Last=W
net_Curr（4）
Above-mentioned formula is the rudimentary algorithm estimated remaining time of infusing.For improve further transfusion remaining time precision of prediction, avoid wrong report, also take following measures at us:
1) consider that infusion bottle and rocking of support can produce inertia force in infusion process, test data may produce the singular point of sudden change.For eliminating singular point, set in monitoring facilities: if current flow measured value is greater than 0.2g/s, then the front infusion flow rate value once recorded is replaced currency.Reason is: often drip the quality of transfusion for being about 0.02g, the excessive velocities of transfusion per second 10, generally forbids in clinical.
2) digital medium filtering: in order to reduce interference further, continuous measurement sorts the data for 5 times, gets its intermediate value for exporting.
3) the single-chip microcomputer floating number error of calculation is reduced: above-mentioned algorithm finally needs programming realization on STC15W4K single-chip microcomputer, and in order to reduce single knuckle number calculation deviation, we change the unit of weight in formula (1)-(4) into mg by g; In sampling time interval, the sampling time will be decided to be 10s, and be convenient to divide exactly, and adopt external crystal-controlled oscillation 12MHz crystal oscillator, to avoid the timing offset using the crystal oscillator of single-chip microcomputer inside to cause.
4) at hardware aspect, select range suitable, highly sensitive pulling force sensor: the magnitude of voltage that pulling force sensor exports is directly proportional to the weight of perception.If measurement range selection is excessive, when same sensitivity, the precision of carrying out analog digital conversion (ADC) will decline.By investigation, weight of once infusing is generally less than 1kg, and therefore our selected range is the S type full-bridge pulling force sensor of 1kg, and the output sensitivity of sensor is 2.0mv/V.
The data of single-chip microcomputer can directly be sent on the smart mobile phone of sufferer and nurse by apparatus of the present invention, and to grasp transfusion progress in real time, the anxiety alleviating sufferer waits for mood, improves the work efficiency of nurse.For this reason, we utilize Java language to develop corresponding Android mobile phone control APP, and A, B, C, D represent the infusion bottle (gross weight is had any different) that step is dissimilar.When APP sends character to single-chip microcomputer " S ", data acquisition starts; When transmission character " P " represent, then stop data acquisition.The header of " residuals weight ", " flow velocity " and " remaining time " three kinds of packets that single-chip microcomputer sends over the addition of ' a ', ' b ', ' c ' three characters respectively as differentiation, packet first character can be first judged after mobile phone receives data, then intercept from character to last data, different pairs according to character shows according to carrying out classification, and particular flow sheet as shown in Figure 3.
The present invention can measure the flow velocity of transfusion device in real time, weight and transfusion remaining time, and being sent to by above-mentioned information wireless on the smart mobile phone of sufferer and nurse, when being less than setting value remaining time when infusing (as 10 minutes), automatic alarm.To grasp transfusion progress, reasonable arrangement time in real time, alleviate the anxious waiting emotion of sufferer, to improve the work efficiency of comrade nurse.And leave Zigbee wireless networking interface, be convenient to the networking of multiple stage terminal wireless, carry out integrated with hospital existing doctors and patients information management system.
Claims (3)
1. a transfusion device monitoring system, it is characterized in that, infusion bottle is suspended on accurate pulling force sensor, pulling force sensor gathers the real-time weight of infusion bottle, pulling force sensor exports and be input to analog-to-digital conversion module after amplifying, analog-to-digital conversion module exports and connects single-chip microcomputer, export in real time after single-chip microcomputer internal calculation transfusion residuals weight, flow velocity and remaining time data, single-chip microcomputer is by bluetooth module and Android smartphone communication, Android smartphone shows the residuals weight of liquid in real time, flow velocity and remaining time information, single-chip microcomputer output alarm signal shows to LED.
2. transfusion device monitoring system according to claim 1, is characterized in that, described pulling force sensor selected range is the S type full-bridge pulling force sensor of the full liquid weight of transfusion device, and the output sensitivity of sensor is 2.0mv/V.
3. the monitoring method of transfusion device monitoring system according to claim 1 or 2, it is characterized in that, concrete steps are as follows:
1) Android smartphone sends data acquisition signal to single-chip microcomputer, and the sampling time interval of single-chip microcomputer setting carries out Real-time Collection to transfusion device weight;
2) single-chip microcomputer carries out data calculating:
Sensor acquisition to gravimetric value be W
0, the gross weight of infusion bottle is W
1, then net weight of infusing:
W
net=W
0-W
1, unit: g;
The sampling time interval of sensor is Ts second, and the sampled value of adjacent 2 times is denoted as W
net_Last, W
net_Curr, utilize differential principle, current infusion flow rate V can be obtained
currfor:
V
curr=(W
net_Last-W
net_Curr)/Ts, unit: g/s;
Estimate T remaining time for the first time
leftfor:
T
left=W
net_Curr/ V
curr,unit: s;
Again transfusion net weight value and infusion flow rate value are carried out iteration, to realize the automatic renewal of data:
V
Last=V
curr,W
net_Last=W
net_Curr；
3) single-chip microcomputer processes calculating data:
Unit of weight is changed into mg by g;
Current flow measured value is greater than the speed of transfusion per second 10, as invalid data, then the front infusion flow rate value once recorded is replaced currency;
Continuous measurement sorts the data for 5 times, gets its intermediate value for exporting;
When being less than setting value remaining time when infusing, single-chip microcomputer output alarm signal;
Using residuals weight, flow velocity and remaining time three kinds of packets header with the addition of ' a ', ' b ', ' c ' three characters respectively as differentiation;
4) single-chip microcomputer transmits data to Android smartphone, can first judge packet first character, then intercept to last data from character after mobile phone receives data, and the different pairs according to character shows according to carrying out classification;
5) Android smartphone sends and stops data acquisition signal to single-chip microcomputer, and single-chip microcomputer stops gathering.
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| CN201610143077.3A CN105536105A (en) | 2016-03-14 | 2016-03-14 | Infusion set monitoring system and monitoring method |
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| CN201610143077.3A CN105536105A (en) | 2016-03-14 | 2016-03-14 | Infusion set monitoring system and monitoring method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106075649A (en) * | 2016-05-25 | 2016-11-09 | 沈阳航空航天大学 | Infusion alarm with time display function and control method thereof |
| CN106581813A (en) * | 2017-01-10 | 2017-04-26 | 吴新社 | Gravity transfusion pump |
| CN109029554A (en) * | 2018-06-19 | 2018-12-18 | 青海省药品检验检测院 | Infusion apparatus multifunctional tester |
| CN109481784A (en) * | 2018-09-13 | 2019-03-19 | 壹妙芯(厦门)科技有限公司 | A kind of drop remaining time detection device and system |
| TWI680778B (en) * | 2018-06-04 | 2020-01-01 | 永磐科技股份有限公司 | Intravenous drip real-time monitoring system and method |
| CN110812599A (en) * | 2019-11-22 | 2020-02-21 | 四川蓝色港湾科技有限公司 | Infusion state monitoring method for infusion monitoring terminal and infusion bottle hanging device |
| CN111714722A (en) * | 2019-03-21 | 2020-09-29 | 湖南环境生物职业技术学院 | Medical care monitoring device |
| CN113289131A (en) * | 2021-07-13 | 2021-08-24 | 南通市第一人民医院 | Intelligent infusion hook with reminding function |
| CN116889661A (en) * | 2023-07-12 | 2023-10-17 | 湖南山山自动化科技有限公司 | Intelligent transfusion terminal control system with shutoff function and method thereof |
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| CN106075649A (en) * | 2016-05-25 | 2016-11-09 | 沈阳航空航天大学 | Infusion alarm with time display function and control method thereof |
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| TWI680778B (en) * | 2018-06-04 | 2020-01-01 | 永磐科技股份有限公司 | Intravenous drip real-time monitoring system and method |
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| CN109481784A (en) * | 2018-09-13 | 2019-03-19 | 壹妙芯(厦门)科技有限公司 | A kind of drop remaining time detection device and system |
| CN111714722A (en) * | 2019-03-21 | 2020-09-29 | 湖南环境生物职业技术学院 | Medical care monitoring device |
| CN110812599A (en) * | 2019-11-22 | 2020-02-21 | 四川蓝色港湾科技有限公司 | Infusion state monitoring method for infusion monitoring terminal and infusion bottle hanging device |
| CN113289131A (en) * | 2021-07-13 | 2021-08-24 | 南通市第一人民医院 | Intelligent infusion hook with reminding function |
| CN116889661A (en) * | 2023-07-12 | 2023-10-17 | 湖南山山自动化科技有限公司 | Intelligent transfusion terminal control system with shutoff function and method thereof |
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Application publication date: 20160504 |